Correct both sides have faced probably dozens of casualties, possibly several hundred and both sides put out videos of destroyed armor and casualties. I think due to videos and social media it’s difficult to hid anything.
Armenia has downed dozens of Azerbaijan drones in recent years. It’s difficult to say why sometimes the Azerbaijanis lose lots of drones while other times they seem to have success. Probably not enough air defenses for Armenia when the Azerbaijanis are successful.
Not from the recent conflict but pretty recent:
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Azerbaijan went in for the offensive but underestimated how prepared and determined the Armenians were. The Azerbaijanis got hit with everything from tanks to ATGMs to artillery. It’s pretty impressive considering Armenia has virtually no drones while Azerbaijan has dozens of western armed drones and at the moment the only real casualties the Azerbaijanis seem to be able to inflict is by drones. Maybe that will change or maybe we just don’t have all the information but this seems to be the situation.
Much of Armenian Successes have been because they were trained by the Russian military and participated in military exercises. Russia has a lot of experience fighting in Syria, Chechnya, and Georgia. Russia also holds hundreds of war games a year. This translates into battlefield success. The Turks, on the other hand, trained the Azerbaijanis but the Turks themselves were getting wrecked in Syria even with hordes of jihad canon folders leading the charge.